Yang, H., Jones, L., Ryll, H., Simson, M., Soltau, H., Kondo, Y., Sagawa, R., Banba, H., MacLaren, I. and Nellist, P. D. (2015) 4D STEM: high efficiency phase contrast imaging using a fast pixelated detector. Journal of Physics: Conference Series, 644, 012032. (doi: 10.1088/1742-6596/644/1/012032)
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Abstract
Phase contrast imaging is widely used for imaging beam sensitive and weak phase objects in electron microscopy. In this work we demonstrate the achievement of high efficient phase contrast imaging in STEM using the pnCCD, a fast direct electron pixelated detector, which records the diffraction patterns at every probe position with a speed of 1000 to 4000 frames per second, forming a 4D STEM dataset simultaneously with the incoherent Z-contrast imaging. Ptychographic phase reconstruction has been applied and the obtained complex transmission function reveals the phase of the specimen. The results using GaN and Ti, Nd- doped BiFeO3 show that this imaging mode is especially powerful for imaging light elements in the presence of much heavier elements.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | MacLaren, Dr Ian |
| Authors: | Yang, H., Jones, L., Ryll, H., Simson, M., Soltau, H., Kondo, Y., Sagawa, R., Banba, H., MacLaren, I., and Nellist, P. D. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Journal of Physics: Conference Series |
| Publisher: | Institute of Physics Publishing Ltd. |
| ISSN: | 1742-6588 |
| ISSN (Online): | 1742-6596 |
| Copyright Holders: | Copyright © 2015 The Authors |
| First Published: | First published in Journal of Physics: Conference Series 644(1):012032 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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